Our breakthrough 95% energy efficiency is the step change needed to make green hydrogen a reality

E-TAC reaches its unparalleled 95% efficiency (compared to 60-70% efficiency of alternative methods) by avoiding the inefficient electrochemical Oxygen Evolution Reaction of conventional electrolysis, replacing it with a Thermally Activated Chemical (TAC) reaction that doesn't consume power or heat. The system level efficiency amounts to only 42 kWh/kg H2 (i.e. 95% based on HHV), significantly reducing operating costs.

The system design allows a flexible operational scheme, making it compatible with a wide range of partial power loads. The inherently dynamic two-phase process is a perfect fit to the fluctuating nature of renewable energy. This means our systems work well with intermittent renewable energy sources, like solar and wind.

In E-TAC, the proprietary anode is sourced from nickel - a cheap and readily available metal (whereas conventional electrolysis requires rare, costly metals like Platinum and Iridium to be used for the electrodes). Nickel supply chains are not expected to suffer any difficulties in the future, as opposed to other rare metals. Additionally, since hydrogen and oxygen generation are time-separated, an expensive membrane is not required. Eliminating the need for a membrane and using low-cost, mass produced electrodes greatly reduces capital expenditures.

The two-phase process and membrane-free structure facilitates hydrogen production at 45 bar as a standard offering. The higher outlet pressure eliminates the need for subsequent compression in almost all applications.

Hydrogen and oxygen are produced at different times, so they are never in danger of mixing. In conventional electrolysis only a thin membrane separates hydrogen and oxygen gas flows, which may form an explosive mixture.

Our systems do not require dissipation of large amounts of low grade heat due to the 95% system efficiency. In conventional electrolysis, up to 30-40% of the electrical power in put is transformed to low grade heat, which cannot be used and thus need to be dissipated in air coolers or cooling towers. Avoiding this saves CAPEX, OPEX and plot space.